Casing for a hot tub air blower



FIG. 1 is a bottom and left side perspective view of a casing for a hot tub air blower showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof. 

The design for a casing for a hot tub air blower, as shown. 